- India has released an updated seismic zonation map under the new Earthquake Design Code (2025).
- Earlier Maps Underestimated Himalayan Risk: Previous zonation divided the Himalaya into Zones IV and V, despite the belt sharing one of the world’s most active tectonic systems.
- Outdated Methodology: Older models relied heavily on known past earthquake locations, magnitudes, broad geology, soil types & historical damage patterns.
- Underestimation of Rupture Propagation: Earlier maps did not adequately account for southward propagation of Himalayan Frontal Thrust ruptures
- Populated foothill regions like Dehradun (near Mohand) faced underestimated risk despite proximity to major thrust faults. Read More
India’s Updated Seismic Zonation Map (2025)
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